allegations his staff used about 6000 housing voucher recipients to get out the vote on election day. >> it's the latest allegation of wrongdoing in a campaign remains under federal investigation. >> i don't know of the existence of any such list. >> all of these things happened in his campaign that he has no idea about. >> it involves several people in housing complexes located in precincts grey won by large margins. this comes after supporters have pleaded guilty to various campaign violations. >> every time they look, they're going to find something. >> as the investigations continue, he continues with the day to day business of the city. even a routine speech at the aids conference was sidetracked by protestors upset with a lack of housing. >> @ after his speech, he refused to stop and speak with reporters. >> this seems to be no exception. it can't keep tripping or else he's going to drown. >> we are continuing to do our job every day and if somebody has some concrete evidence, put it on the table. >> as for that concrete evidence, it's important to point out neither the prosecut